Penelitian ini bertujuan untuk mendeskripsikan kemampuan berpikir kritis ditinjau dari gaya belajar matematika siswa. Jenis penelitian ini adalah penelitian deskriptif kualitatif. Subjek penelitian adalah siswa kelas XII SMA Negeri Punung, Kabupaten Pacitan. Subjek penelitian sebanyak enam siswa dengan masing-masing dua siswa untuk gaya belajar visual, auditorial, dan kinestetik. Data penelitian diambil melalui angket gaya belajar, tes kemampuan berpikir kritis, dan wawancara. Data angket dianalisis untuk menentukan jenis gaya belajar siswa, sedangkan data hasil tes dianalisis berdasarkan aspek kemampuan berpikir kritis matematis yaitu FRISCO – Focus, Reason, Inference, Situation, Clarify, and Overview. Hasil penelitian menunjukkan bahwa kemampuan berpikir kritis siswa pada masing-masing gaya belajar memiliki tingkatan yang berbeda. Siswa dengan gaya belajar visual memiliki kemampuan berpikir kritis pada kriteria sangat baik, siswa dengan gaya belajar auditorial memiliki kemampuan berpikir kritis pada kriteria cukup, sedangkan siswa dengan gaya belajar kinestetik memiliki kemampuan berpikir kritis pada kriteria baik.  Namun demikian ketiganya mempunyai potensi kuat untuk mengembangkan kemampuan berpikir kritis dalam matematika melalui stimulasi dari guru. Analysis of critical thinking skills in terms of students' mathematics learning stylesAbstractThis study aimed to describe critical thinking skills in terms of students’ mathematics learning styles. It was a qualitative descriptive study. The study subjects were twelfth-grade students of SMA Negeri Punung (Public Senior High School), Pacitan Regency, Indonesia. The subjects were six students, with two students each for visual, auditory, and kinesthetic learning styles. The data were taken through learning style questionnaires, critical thinking skills tests, and interviews. The questionnaire data were analyzed to determine the type of student learning style, while the test result data were analyzed based on aspects of mathematical critical thinking skills, namely FRISCO – Focus, Reason, Inference, Situation, Clarify, and Overview. The results showed that students’ critical thinking skills in each learning style had different levels. Students with visual learning styles have the critical thinking skills on very good criteria, students with auditory learning styles have the critical thinking skills on moderate criteria, while students with kinesthetic learning styles have the critical thinking skills on good criteria. However, all three have strong potential to develop critical thinking skills in mathematics through stimulation from the teacher.

An appropriate learning method can improve students’ learning achievement. The cooperative learning method encourages students to improve their mathematics learning achievement. Mathematics learning achievement is one indicator of achieving learning objectives. Mathematics is an important lesson to be learned and must be mastered by students. The purpose of this research was to analyze the effect size of the relationship between Cooperative learning method and mathematics learning achievement through meta-analysis quantitative research approach. In this research, the cooperative learning method serves as an independent variable, and mathematics learning achievement serves as the dependent variable. The data was obtained from the online database search results on Google Scholar in 2010-2020. The sample used was 16 research publications that have met the specified criteria. The data analysis technique used was the meta-analysis quantitative approach with correlation meta-analysis. The results showed that there was a positive and significant relationship (level of 5%) between the cooperative learning method and students’ mathematics learning achievement. The average effect size value was 0.15 in the range of 0.04 to 0.27 which was included in the low category. These results have proven the consistency of the findings of previous research.

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Culture-based learning allows teachers and students to actively participate based on the culture they already know so that optimal learning outcomes can be obtained. One that can bridge between culture and education, especially mathematics is ethnomathematics. For this reason, it is necessary to plan teaching materials that are by the characteristics of mathematics learning based on the Yogyakarta Palace of Ethnomathematics. This study aims to develop a valid, practical, and effective ethnomathematics-based mathematics teaching material in Yogyakarta Palace. This research develops mathematics teaching materials based on the Ethnomathematics of Yogyakarta Palace. The product was developed using a 4-D development model developed by Thiagarajan, which consisted of the define, planning, develop and disseminate stages. The products produced are the ethnomathematics-based mathematics teaching materials in Yogyakarta in the form of Mathematics Modules and Student Activity Sheets. After going through the validation stage by experts, the products developed are included in the valid category. From the results of product trials, it is known that the products produced are included in practical and effective criteria.

This research is a descriptive-analytical study that aims to describe how student solve high order thinking (HOT) problem. The research subject was a student who was chosen based on HOT problem-solving in a non-routine way and took a mathematics course at Science Education of Universitas Sarjanawiyata Tamansiswa Yogyakarta DS Setiana1. Data were collected using observation, documentation and interviews methods, then will be analyzed descriptively. Based on the analysis that has been done, it was found that: (1) the strategy used by the student to solve the HOT problem was obtained from the internet; (2) there are errors when student applied the strategy that has been obtained in solving the HOT problem; (3) the student have difficulties when solving HOT problem in the same way. The results of this analysis are expected to provide a little description for educational activists related to the solving of HOT problem by students.